T o n g: > > I saw that it is a common practice to issue sync several times before > umount. I know it's a good practice, but is it really necessary?
No, it's completely unnecessary as umount does the sync for you. Just
don't unplug removable drives before umount returns.
> If I copy a big chuck of file to my USB, then issue umount immediately,
> will I lost any data?
No. Umount will do the sync and take (at least) the same time to return
as sync would do.
> How about umount swaps? umount really necessary?
That's a different story. When umounting swap, you are forcing the
system to re-read all of swap back into memory (if it's not there
anymore). But how often do you do that manually? Do you put swap on
removable drives!?
J.
--
I throw away plastics and think about the discoveries of future
archeologists.
[Agree] [Disagree]
<http://www.slowlydownward.com/NODATA/data_enter2.html>
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